#### Answer

7$x^{2}$ + 15

#### Work Step by Step

14$x^{2}$ + 5 - [7($x^{2}$ - 2) + 4]
Step 1: Drop parentheses and multiply 7 with each term and change the sign of each term in parentheses: 7$x^{2}$ - 14
Step 2 Simplify inside brackets: -14+4 = -10
14$x^{2}$ + 5- [7$x^{2}$ - 10]
Step 3 drop brackets and change the sign of each term in brackets
14$x^{2}$ + 5- 7$x^{2}$ + 10
Step 4: Group like terms( 14$x^{2}$ - 7$x^{2}$ ) +(5 + 10)
Step 6: Combine the like terms
( 14$x^{2}$ - 7$x^{2}$ ) = 7$x^{2}$
So, final solution 7$x^{2}$ + 15